[Rtai] RE : Netrpc communication problem

[laurent boudou]

Hello Thomas,

I had the problem concerning the connection between a 32 bits middle
tower and a 64 bits laptop. Both uses RTAI-3.6
A netrpc release is available in Magma CVS which allows distributed RTAI
applications on any x86.
I tried it and it works fine now.
Nevertheless, I compiled the Kernel(2.6.17) and RTAI in 64 bits mode on
my laptop.

Hope it helps you.

Best Regards

Laurent 

-----Message d'origine-----
De : rtai-bounces at rtai.org [mailto:rtai-bounces at rtai.org] De la part de
Thomas Eigel
Envoyé : jeudi 8 mai 2008 00:59
À : rtai at rtai.org
Objet : [Rtai] Netrpc communication problem

Hello everybody,

after upgrading to a new laptop, I experience problems running my
software. The original and working setup was:
  * One dedicated realtime PC running an interface task (besides other
tasks):
           1.4 GHz Pentium M,
           kernel 2.6.19,
           RTAI-3.5
  * One laptop for monitoring (connecting to the interface task via
netrpc and exchanging data via mailboxes):
           1.7 GHz Pentium M,
           kernel 2.6.19,
           RTAI-3.5

After getting a new laptop, I used the chance to upgrade to RTAI-3.6.
The new setup is:
  * Same realtime PC now with kernel 2.6.22 and RTAI-3.6
  * New laptop (Lenovo ThinkPad T61p):
           2.2GHz core2 duo,
           kernel 2.6.22 (i386),
           RTAI-3.6

Now, when connecting to the remote PC, the program freezes. I traced
the error down to
  RT_TASK* iftask = (RT_TASK*)RT_get_addr(node, port, "IFTASK");

I tried to run the realtime process and the monitor process on the
same laptop. The local connection is still working alright.
Might there be a problem connecting from a 64 Bit to a 32 Bit
processor (although there is 32 Bit Linux installed on both)?

I'm slightly panicing so any help would be very appreciated.

Thanks alot
Thomas
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